Siemens 6ES7 241-1CH32-0XB0 SIMATIC S7-1200, Communication Module cm 1241, RS422/485, 9 PIN SUB D (Female) Supports Message Based Freeport: Amazon.com: Industrial & Scientific
Siemens 6ES7 231-4HA30-0XB0 SIMATIC S7-1200, Analog Input SB 1231, 1 AI, 10V DC (12 BIT RES.) OR 0-20 MA: Amazon.com: Industrial & Scientific
Amazon.com: TPA3116 2.1 50WX2+100W+ Bluetooth Class D power amplifier Completed board New : Electronics